LAN :Local Area Network. A network of computers connected via cables or a wireless system.

LANC:A connection developed by Sony, used to link remote-control units, edit decks, etc.

Lavalier Microphone(AKA lav, lapel or lap microphones.) A very small condenser mic designed to pick up speech from a single person.More Info: Lav Mics, Condenser Mics

Lens:A transparent structure made of glass or other material, with at least one curved surface, which causes the
light rays passing through it to converge or diverge in a controlled fashion.More info: Lenses

Letterbox Format:In video and television, the practice of placing black bars at the top and bottom of the frame, in
order to simulate a wide-screen format (as if the viewer were looking through the slot in a letterbox).More info: Letterbox format, Aspect ratios

Light:That section of the electromagnetic spectrum which is visible, ie. perceptable to the human eye. Specifically,
white light contains the wavelengths from 400nm (nanometres) to 700nm. Light travels through a vacuum at approximately 300,000 km (186,000 miles) per second.More info: Lighting tutorials

Lighting, Three-Point:A standard lighting technique using three lights: The key, fill and back lights.More Info: 3 point lighting

Limiter:A device which limits the level of a signal to a specified threshold.More info: Audio Limiters